I learned how to weld aluminum 17+ years ago. After school was over, I really never had any need to weld it again, until recently. well, since I at least knew how to weld aluminum at one time , and nobody else on the job know how to, I was given the job . Anyway, I had a couple scrap pieces left and decided to run a sample weld on them. I'd say at least 95% of my welds turned out to this level (see attachment) or better on the project I was working on. BTW, the material is 1/4" thick, and the weld joint is a butt, that i gapped about 3/32 of an inch. On the real project, I had to give the material a very healthy preheat for my Lincoln Squarewave 175 to get the job done.
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